.video{
	max-width: 750px;
	margin: 0 auto;
	background: #cb394e;
	min-height: calc(100vh);
	background-image: url('http://image.haoxuehaozhi.com/2021/0209/original/2fb3704597d84009af024415146e5bc3.jpg');
	background-repeat: no-repeat;
	background-position: 6rem auto;
	background-size: 7.5rem;
	
}
.video-js{
	width: 7rem;
	height: 4.7rem;
	left: 0.25rem;
	position: relative;
	top: 3.6rem;
	max-width: 700px;
	max-height: 470px;
}
/*.back{
	height: calc(100vh - 5rem);
	background-image: url('http://image.haoxuehaozhi.com/2021/0209/original/2fb3704597d84009af024415146e5bc3.jpg');
	background-repeat: no-repeat;
	background-position: 6rem auto;
	background-size: 7.5rem;
}*/
#tishi{
	display: inline-block;
	position: fixed;
	top: 6rem;
	margin: 0 auto;
	border-radius: 0.8rem;
	background: rgba(0,0,0,0.7);
	color: #FFFFFF;
	width: 5.5rem;
	height: 1rem;
	text-align: center;
	line-height: 1rem;
	margin-left: 1rem;
	display: none;
}
